CVE-2006-7027
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedMicrosoft Internet Security and Acceleration (ISA) Server 2004 logs unusual ASCII characters in the Host header, including the tab, which allows remote attackers to manipulate portions of the log file and possibly leverage this for other attacks.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceISA Server 2004 logs unusual ASCII characters (including tabs) in HTTP Host headers without proper sanitization, allowing attackers to inject arbitrary content into log files. This log injection could potentially be leveraged for further attacks such as log forging, session hijacking, or injecting malicious content through log viewers.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data= 2004CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Authentication
- None
- Confidentiality
- Complete
- Integrity
- Complete
- Availability
- Complete
AV:N/AC:L/Au:N/C:C/I:C/A:C
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
-
Confirm ISA Server 2004 installationCheck the system for ISA Server 2004 by reviewing installed programs or checking the ISA Server service name (Microsoft ISA Server 2004) in services.mscAffected if The system runs Microsoft ISA Server 2004 as the installed version
-
Verify HTTP logging is enabledOpen ISA Server Management console, navigate to Monitoring > Logging and confirm that logging is configured and enabled for web requestsAffected if Logging is enabled - this is required for the log injection to be exploitable
-
Locate ISA Server log filesIn ISA Server Management, check the logging configuration to find the log directory path (typically in C:\ISAServer\Logging or configured web proxy log location)Affected if Log files exist and are stored on the system
-
Inspect recent logs for unusual charactersOpen recent ISA Server web proxy logs (typically .log or .txt files) and search for Host header entries containing tab characters (0x09), carriage returns, or non-standard ASCII charactersAffected if Log entries contain unescaped special characters in Host header fields
The system is affected if it runs Microsoft ISA Server 2004 with HTTP logging enabled, and log files contain unsanitized special characters in Host header entries.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade from ISA Server 2004 to a supported solution (Microsoft Forefront TMG or modern reverse proxy/WAF) as ISA Server 2004 is end-of-life. Alternatively, implement input validation on the ISA Server to filter or escape special characters in Host headers before logging.
- Consultation8.0 h
- Implementation24.0 h
- Testing12.0 h
- Review / QA6.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $14,080.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2006-7027 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2006-7027 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data